Hi everyone, having an issue with matching mating curved profiles. The parts align perfectly in the middle of the curve but are out by about .005 on both ends, I’ve tried inside the line on 1 and outside the line on the other, on the line for both is close but not perfect. I’m thinking this shouldn…

Hi Michael, thanks for your reply. So ya I am trying to make something similar to what your picture shows. I have attached some pic’s which should give you a much better idea then my explanation. I’m thinking that some sort of off-set is the answer but I’m not 100% sure of how much, seems to make se…

Hi Ed, thanks for your much welcomed reply, I have attached a few pictures, as for the size the end caps are approx. 4.5x11 and the main board is 14.5 x11. The arcs are orientated the same way when cut. After some frustration I did a test cut, I took the tool path and a single board, ran it hoping t…

Thanks for your reply Grant, I’ve watched some of Stubbs video’s ( at least I think that’s his name) in the past. I believe I see the problem that being I have to compensate for the ¼ end mill bit. So as I see it cutting 1 piece on the outside of the line and then off setting the second piece by ¼ …

[image] Brunom: Where did you come up with the 1mm offset on your piece. I just pulled it out of the air, that curved piece was my first non-practice try. Maybe an even smaller offset would work better? I think I am on the right track with the offset method, but we always think we are on th…

Ya the video Grant linked was good. I’m thinking if nothing else I could make the templates on the cnc and then cut the profiles on the router table using the method in the video. Not giving up on doing the matting profiles on the cnc just yet,

I might be stretching my knowledge a bit here, since I usually use Fusion 360 - but typically I would model this as two mating parts, and the tool offset would come in automatically in the toolpath generation (based on the radius of the 1/4 inch bit itself). I would expect any offset error to come f…

Thanks to all that replied, much appreciated and it has certainly given a better understanding of the problem and corrective solution(s). I plan on somewhat starting fresh making new end pieces and using a combination of your suggestions on some test pieces until I get it right. Will post with my re…

@Brunom I apologize for the long delay in adding to the discussion. I have an idea on how to do this, but I will try it in the shop before posting - to save me the embarrassment of being wrong. I hope to do that early tomorrow and will post my results.

@Brunom OK, finally, I got this done! I see that you posted on the Vectric forum, too and I’ve posted my successful project on there as well. I’m attaching two screencaps of the tool paths that I cut. The two pieces mate perfectly. A couple of things that I found: The actual diameter of my “1/4”…

Glad that worked out Grant and I hope that’s all @Brunom needs to do. I’m now wondering if it makes a difference if you have one curve vs multiple curves. I cut the pieces in the photo like you did, one cut on one side of the curve and one on the other. As you can see they don’t fit well at all. …

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Matching profiles of mating parts

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